title: Wnt10b promotes growth of hair follicles via a canonical Wnt signalling pathway.
abstract: BACKGROUND
  Wnt10b (wingless-related mouse mammary tumour virus integration site 10b) plays various roles in a wide range of biological actions, including hair-follicle development.
  
  
  OBJECTIVE
  To assess the roles that Wnt10b plays in postnatal hair-follicle growth.
  
  
  METHODS
  Adenovirus vectors AdWnt10b, AdGFP, AdGFP plus AdRFP, AdWnt10b plus AdFrzB, and AdWnt10b plus AdSimBC were co-cultured separately with vibrissae. In situ protein expression of Wnt10b, β-catenin and Lef1 was determined by immunohistochemistry, and the proliferation status of the hair follicle was detected by 5-bromo-2-deoxyuridine (BrdU) labelling. The presence of Wnt signalling molecules in the three stages of hair-follicle growth was detected by PCR-based microarray.
  
  
  RESULTS
  AdWnt10b-infected cells were able to secrete bioactive Wnt10b, and when this was added into the basal medium, the vibrissae grew faster than in control medium or in medium containing canonical Wnt signalling antagonists. The in situ protein expression of Wnt10b was consistent with that of β-catenin and Lef1. The expression locus of Wnt10b was almost the same as the proliferating cells labelled by BrdU in the anagen hair follicle.
  
  
  CONCLUSIONS
  Wnt10b may promote hair-follicle growth by inducing the switch from telogen to anagen via a canonical Wnt signalling pathway to promote the proliferation of matrix cells.
authors.affiliation: Department of Cell Biology, Third Military Medical University, ShaPingBa, Chongqing, China.
authors.forename: Y-H
authors.initials: YH
authors.lastname: Li
authors.forename: K
authors.initials: K
authors.lastname: Zhang
authors.forename: J-X
authors.initials: JX
authors.lastname: Ye
authors.forename: X-H
authors.initials: XH
authors.lastname: Lian
authors.forename: T
authors.initials: T
authors.lastname: Yang
mesh_terms: D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D049109:Cell Proliferation; D002478:Cells, Cultured; D005260:Female; D005822:Genetic Vectors; D018859:Hair Follicle / Q000166:cytology / Q000254:growth & development*; D051379:Mice; D008810:Mice, Inbred C57BL; D009924:Organ Culture Techniques; D015398:Signal Transduction / Q000502:physiology; D051153:Wnt Proteins / Q000235:genetics / Q000502:physiology*; D051176:beta Catenin / Q000502:physiology
chemical_list: C495267:CTNNB1 protein, mouse; D051153:Wnt Proteins; C102068:Wnt10b protein, mouse; D051176:beta Catenin